Unions get more workers fired and less hired. When they force employers to give them higher wages and benefits, the end result is the employers being forced to give them less hours, lay off more, and hire less.
Contrary to what Bernie Sanders wants you to believe, not all employers are evil vampires sucking on the system. A lot of employers are just out there trying to run their business the best they can, and when unions interfere, that hurts both the employer and employee.
More power to unions = a worse economy for everyone

You CANT have it BOTH ways. Either Unions are GOOD for employees or BAD, you don' get both. USUALLY the Republican talking point is that Unions are SO good to employees that it is IMPOSSIBLE to FIRE someone in a Union. First of all, i WISH that were the case, because employees NEED protection from their employers. I've worked in HR for McDonald's, Walmart, Coca Cola,, Hewlett Packard, AT & T, United Health and they ALL had the SAME entry level employee ABUSIVE behavior towards those at that bottom of the ladder

You're right, you can't have it both ways. In fact, there's only one way you can have it; bad. Bad for the job market as a whole, and bad for the employers.
If you start at the bottom, of course you're not going to get special treatment. But that's the whole point of working, so that you can move up the ladder, not so you can just be handed benefits on a silver platter.

You don't seem to understand that when union demands go up. so does unemployment. It's either a few people make a good wage, or one man makes a great wage and all his friends are out on the streets begging for food.

EVERYTHING I say is from MANY YEARS of HR, PAYROLL, BENEFITS, and EMPLOYEE RELATIONS experience. I KNOW ALL of the rules and policies regarding PAY and PROMOTIONS and PERKS and BENEFITS. They HUGELY FAVOR the employees that are farther up the ladder, the HIGHER your position the BETTER benefits in EVERY Way. I don't know people getting BETTER PAY if you are higher up to corporate ladder, but EVERYONE NEEDS PAID TIME OFF and ALL of the other BENEFITS